<script lang="ts" setup name="HomeBrand">
import HomePanel from './home-panel.vue'
import useStore from '@/store'
import { ref } from 'vue';
import { computed } from '@vue/reactivity';
const { home } = useStore() 
home.getBrandlist()
const index=ref(0)
// 算出最大页数:数据总条数/每页的数据,并且用内置函数向上取整
const maxpage=computed(()=>Math.ceil(home.Brandlist.length/5))
</script>

<template>
  <HomePanel title="热门品牌" sub-title="国际经典 品质保证">
    <template v-slot:right>
    <!-- index大于0才能--,index等于0是按钮禁用 -->
      <a 
      href="javascript:;"
      :class="{disabled:index===0}"
      @click="index>0&&index--"
      class="iconfont icon-angle-left prev"></a>
    <!-- index小于最大页数才能++,如果index等于最大页数按钮禁用 -->
      <a 
      href="javascript:;"
     :class="{disabled:index===maxpage-1}"
     @click="index<maxpage-1&&index++" 
     class="iconfont icon-angle-right next"></a>
    </template>
    <div class="box" ref="box">
        <transition name="fade">
      <ul 
      class="list"
        v-if="home.Brandlist.length"
        :style="{ transform: `translateX(${-index * 1240}px)`,
         width:maxpage+'00%'
        }">
        <li v-for="item in home.Brandlist" :key="item.id">
          <RouterLink :to="`/`">
            <img v-lazy="item.picture"/>
          </RouterLink>
        </li>
      </ul>
       <div v-else class="skeleton">
          <XtxSkeleton
            class="item"
            v-for="i in 5"
            :key="i"
            animated
            bg="#e4e4e4"
            :width="240"
            :height="305"
          />
        </div>
        </transition>
    
    </div>
  </HomePanel>
</template>

<style scoped lang="less">
.skeleton {
  width: 100%;
  display: flex;
  .item {
    margin-right: 10px;
    &:nth-child(5n) {
      margin-right: 0;
    }
  }
}
.home-panel {
  background: #f5f5f5;
}
.iconfont {
  width: 20px;
  height: 20px;
  background: #ccc;
  color: #fff;
  display: inline-block;
  text-align: center;
  margin-left: 5px;
  background: @xtxColor;
  &::before {
    font-size: 12px;
    position: relative;
    top: -2px;
  }
  &.disabled {
    background: #ccc;
    cursor: not-allowed;
  }
}
.box {
  display: flex;
  width: 100%;
  height: 345px;
  overflow: hidden;
  padding-bottom: 40px;
  .list {
    width: 200%;
    display: flex;
    transition: all 1s;
    li {
      margin-right: 10px;
      width: 240px;
      &:nth-child(5n) {
        margin-right: 0;
      }
      img {
        width: 240px;
        height: 305px;
      }
    }
  }
}
</style>